Feeding mechanism for riveting machines



June 2, W31, E. B..$TKMP$ON ET AL FEEDING MECHANISM FOR RIVETINGEHACHINES Filed July 25 192,3 2 Sheets-Sheet l June 2, 1931. E. B.STIMPSON ET AL FEEDING MECHANISM FOR RIVETING MACHINES 2 Sheets-Sheet 2Filed July 25, 1925 I mHHm Patented June 2, 1931 UNITED STATES PATENT?mm: 1

")EDWIN B. s'rmrson AND JOSEPH F. sunssne, or BROOKLYN, new YORK,ASSIGNOB-S- TO nnwm IB. s'rmrsoiv COMPANY, or BROOKLYN," NEW YORK, AGQR-IEORATION or 7 NEW YORK Application filed July 25,

' This invention relates generally to the construction of improvedfeeding mechanlsm for riveting machines.

Feeding mechanism for riveting machines 6 as heretofore constructed hasnot been wholly operation of 1'5 tion to obviate the objectionablefeatures referred to and to provide a rivet feeding device which willoperate with a minimum amount of jamming and which will auto--niatically releaseor set free the very occasional blocks or jams whichmay occur.

The invention includes a feeding cup or cylinder having a radiallyslotted edge of a known character and rotatable, about a a horizontalaxis to impel rivets one at a time into a channel or runway leading tothe point of attachment to the work by the riveting members. A featureof the invention resides in the means for supplying rivets to thefeeding cup which includes a delivery orifice so 0 arranged that the cupis maintained inonly a partially filled condition which facilitates thearrangement of'rivets in the radial slots and greatly decreases thetendency to jam. Another feature of the invention resides in theprovision of step-by-step operating mechanism for rotating the feedingcup, the operating mechanism including a yielding ratchet actuating pawlwhich will slip out of engagement with a ratchet tooth in case of a jamand on the return stroke actuate the cup to release the jammed rivet.

Other features of the invention willbe hereafter referred to. I

In the drawings, in which a preferred form of the invention has beenselected for illustration,

- Figure 1 is a view in front elevation of a rivet feeding deviceembodying a preferred form of the invention.

the mechanism was broken FEEDING MECHANISM FOR RIVETING MACHINES 1923.Serial No. 053,655.,

Figure 2 is a view in verticalsection of the device taken at rightangles to Figure 1.

Figure 3 is a view in rear elevation of the device shown in Figure 1.

Figure 4 is a view in front elevation of a feed plate forming part ofthe. device.

Figure 5 is a view in vertical section taken on the line 55 of Figure 4.l p j Referring to the drawings for a more detailed description of theinvention, arivet feeding device is shown inwhich there is included ahopper 10"of any'desired conformation and size and a chute 11 leadingdown-f wardly from the delivery orifice of the hop per and terminatingat an orifice 12 in afeed plate 13 which closes an open side of thechute 11. At 1% is shown a feeding 'cylinder or cup having a radiallyslotted edge 15, theslots 16 of which areof a suitable size to receivethe stem portions l'Z of the rivets which are fed through the deviceinto suitable riveting mechanism not herein shown.

The feeding cup 14 is mounted to rotate with a shaft 18 which extendsthrough the feed plate Band t-he chutell and is pro vided at theright-hand, as viewed in Figure 2 of the drawings, with a toothedratchet pinion 19 through which step-by-step' rota-' tion is transmittedto the feeding cup.

The orifice 12 in the feed plat 13 is arranged'to discharge into thelower portion of the chamber 20 provided by the cup. It will' be seenthat by this arrangement, the level of the mass of rivets deliveredthrough the orifice 12 is maintained the level of' the upper edge of theorifice. The relatively small mass of rivets thereby 'suppliedto thefeed cup only partially fills the chamber provided by the cup andthereby facilitates stirring and tumbling of the mass of rivetscontained therein to insure that rivets will find their way into theradial slots 16 as the slots pass berligath the mass of rivets adjacentthe orifice- The inner edge 21' 'of the feeding cup 14 is spaced fromthe adj acent'e'dge 22 of the lower portion of the feed plate 13adjacent the 'ori fice 124by a suitable distance tojloos'ely receivetherein the head portions 23 of the rive drawings. The channel thusprovided by the spacing of the face 22 of the plate 13 from the edge 21of the cup 14 extends in an arcuate formation along the lower portion ofthe plate adjacent the orifice 12 and leads into a channel 24throughwhich rivets-aredelivered in a counter-clockwise direction of'rotationof, the cup 14, as viewed in Figure 1, to find their way downwardly tothe riveting mechanism that isprovided." r r In order to prevent jamming ofrivets-that 'may for any reason be carried past the channel 24the upper portion-of the feed plate-13'- is spaced at a relativelyconsiderable distance from the edge 21 of the'cup'14to provide achamberor enlarged channel. 25; through which the rive-tsmayfall from theirplaces in.

the radialf slots 16, to. again take their-place as part of the massof'rivetsin the lower portion of thecup. As aifurther addition in thepreventionoffajammingaction the channel 24 is enlargedasfat 2'6-into awidened channel'27 which extends around the; upper half'of the peripheryo fthe cupmember 14. It, willbe seen that theenlarged channel 27 aids inthe removal ofi-Trivetsrfrom the radial f slots 21.,

In order. torotate the feeding cup 14 the toothedlpiiiion 19' isactuated by means" of a'. driving'p'awlT28; which. is pivotally mountedn the upper end ofIanoscillating arm 29 driven in; any suitablemannerthrough an,

operative co,'nnectionwithv the adjacent riveting machine.

V In ordento prevent breakage ofthe mecha nismiby the occasional jammingor catching offalrivetj insuch a wayas to prevent rotation. Qffthe, cup14, the operating pawl,28 is yielldingly held in operative,

position by means of a.- leafspring 30, extending along,

thetopg ofthe p'awl'fromits point of'attach ment to theupper endof the,oscillating arm.

29} By this arrangementfthepawl 28 is permitted'toslip:ontjofengagementwith a tooth on the ratchet pinion 19' whenincreased resistance. to rotation of, they pinion is encountered'by thepresence of a j'anuned'rivet; The slipping of the pawl 28'out 'of'itsengagement with the tooth will'prevent breakage ofthe;

operating-partsl-aswilljbe: clear and, in addition, the return movementof thepawl'along thecurved faceof the tooth has ,amarked tendency toreverse the direction of'rotation of the cup and thereby release thejammed rivet'so that on thenext operating movement Qf'thepawlthestep-by-step rotation of" the cup'can be-resumedli The feeding cup 14 iseasily removed from its-position on, thedriveshaft l8fto which it isfitted through 'a tapering connection against which thelcup is forcedthrougha thumb nut 3l'acting thrOugh a suitable spring member, 32; 7

In the. operation offthe: device. rivets aresuppliedlt'o the. hopper.IOandfind-tlieir way through, chute 11 to the. orificej12 through whichthey are delivered in a restricted but constant supply to the interiorof the feeding cup 14. In the step-by-step rotation of the cup 14 therivets are tumbled and rolled about so that they find their way into theradial slots 16 in the edge of the. cup and are thereby carried to theentrance, end of the chute or channel 24 through which they aredelivered to the riveting mechanism. The restricted delivery oftherivetsto the interiorofthe cup- 14 combined with the yieldingstep-by-step operation of the feed cup obviates jamming ofthemechanismand insures a continuous successive delivery of rivets tothe point where they are attached to the work.

In addition to the yielding function. provided by the spring-held pawl,member 28, the spring member 32 which is; engaged by the thumb nut 31may yield slipping of the feeding cup 141on its shaft to thereby preventin ury to the mechanism,

when the parts are j amnied. I What we. claim is ic 1; In a rivetfeeding device, a chambered rivetpositioning member rotatable about a,horizontal axis, and avertically positioned. expanding channel fordeliveringyrivets-into.

the positioning member. I

2. In a rivet feedingcdevice,.achambered rivet positioning memberrotatable: about a horizontal axis, I having a delivery orifice, openinglaterally into the lower portion ofsaid chambered member, and an.expandin'g'ch'ute' communicatingwith said orifice. f

, 3.In an article feeding; device, a chambered article 'deliveringmemberrotatable about a horizontal axis, an device having a delivery orificeopening laterally into the lower portion ofsaid chamber, an expandingchute leading to said said' 'pawl operatingto vibrate the'ratchet' partson its return and release'the jammed movement. 7 Y 5. 'In' a rivetfeeding device, a chambered rivet positioning member rotatable about ahorizontal axis, asverticalrivet supplying chute, aplate forming onewallofthe chute,

and having an orifice therein positioned to;

deliver rivets from the chute into the lower part of the chamberedmember, means for intermittently rotating the chambered memto.permit..the

af rivet supplying. devicef article supplying by said rotatablechambered the relation of theher, said means including a ratchet andpawl mechanism and a spring normally holding the pawl in yieldingengagement with the ratchet, and said plate being spaced from the upperportion of the chambered member to release rivets carried into the upperportion of the member.

6. In a rivet feeding device, a chambered rotatable rivet deliveringmember, said member having open slots on its peripheral edge, a casinghaving a chute to deliver rivets to the lower part of said member, meanscarried by said casing to support said member on a substantiallyhorizontal axis, said casing adjacent the upper portion of said memberbeing provided with a recess to permit rivets carried upwardly by saidslots to drop to the lower portion of said member, and means tointermittently rotate said member.

In testimony whereof we affix our signatures.

EDWIN B. STIMPSON. JOSEPH F. SUESSLE.

